RC4191 Datasheet PDF - Fairchild Semiconductor
| Part Number | RC4191 | |
| Description | (RC4191 - RC4193) Micropower Switching Regulator | |
| Manufacturers | Fairchild Semiconductor | |
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RC4191/RC4192/RC4193
Micropower Switching Regulator
www.fairchildsemi.com
Features
• High efficiency – 85% typical
• Low quiescent current – 215 mA
• Adjustable output – 1.3V to 30V
• High switch current – 200 mA
• Bandgap reference – 1.31V
• Accurate oscillator frequency – ±10%
• Remote shutdown capability
• Low battery detection circuitry
• Low component count
• 8-lead packages
Description
The RC4191/4192/4193 series of monolithic ICs are low
power switch mode regulators intended for miniature power
supply applications. These DC-to-DC converter ICs provide
all of the active components needed to create supplies for
micropower circuits. Contained internally are an oscillator,
switch, reference, comparator, and logic, plus a discharged
battery detection circuit.
These regulators can achieve up to 85% efficiency in most
applications while operating over a wide supply voltage
range, 2.2V to 30V, at a very low quiescent current drain of
215 mA.
Block Diagram
LBR
4191/92/93
C2
LBD
Q2
CX OSC
LX
Q1
Gnd
C1
+1.31V
1.31V
REF
VFB
IC
+1.2V
BIAS
+VS
The standard application circuit requires just seven external
components for step-up operation: an inductor, a steering
diode, three resistors, a low value timing capacitor, and an
electrolytic filter capacitor. The combination of simple
application circuit, low supply current, and small package
make the RC4193 adaptable to a wide range of miniature
power supply applications.
The RC4193 is most suited for single ended step-up
(VOUT > VIN) circuits because the NPN internal switch tran-
sistor is referenced to ground. It is complemented by Fair-
child Semiconductor's micropower switching regulator, the
RC4391, which is dedicated to step-down (VOUT < VIN) and
inverting VOUT = -VIN) applications. Between the two
devices the ability to create all three basic switching regula-
tor configurations is assured. Refer to the RC4391 data sheet
for step-down and inverting applications.
The RC4191/92/93 series of micropower switching regula-
tors consists of three devices, each with slightly different
specifications. The RM4191 has a 1.5% maximum output
voltage tolerance, 0.2% maximum line regulation, and oper-
ation to 30V. The RC4192 has a 3.0% maximum output
voltage tolerance, 0.5% maximum line regulation, and oper-
ation to 30V. The RC4193 has a 5.0% maximum output volt-
age tolerance, 0.5% maximum line regulation, and operation
to 24V. Other specifications are identical for the RC4191,
RC4192 and RC4193. Each type is available in commercial,
industrial, and military temperature ranges, and in plastic
and ceramic DIPs and S0-8 packages.
65-3465-01
Rev. 1.0.0
Free Datasheet http://www.0PDF.com
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RC4191/RC4192/RC4193
Typical Performance Characteristics
4.0
3.0
2.4V
2.0
1.0
2.0V
1.8V
0
-75 -50 -25
0 +25 +50 +75 +100 +125
TA (¡C)
Figure 1. Minimum Supply Voltage vs. Temperature
PRODUCT SPECIFICATION
300
250
230
200
215
195
150
100
50
0
-75 -50 -25
VS = +6V
0 +25 +50 +75 +100 +125
TA (¡C)
Figure 2. Quiescent Current vs. Temperature
1.33
1.32
1.31
1.30
1.29
1.28
-75 -50 -25
0 +25 +50 +75 +100 +125
TA (¡C)
Figure 3. Reference Voltage vs. Temperature
+2.0
+1.5
+1.0
+0.5
0
-0.5
-1.0
-1.5
-2.0
-75 -50 -25
0 +25 +50 +75 +100 +125
TA (¡C)
Figure 4. Oscillator Frequency vs. Temperature
+2
+1
0
-1
-2
0 5 10 15 20 25 30
+VS (V)
Figure 5. Minimum Supply Voltage vs. Temperature
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for RC4191 electronic component. |
| Information | Total 12 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ RC4191.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| RC4190 | The function is Micropower Switching Regulator. Fairchild |  |
| RC4191 | The function is (RC4191 - RC4193) Micropower Switching Regulator. Fairchild Semiconductor | |
| RC4192 | The function is (RC4191 - RC4193) Micropower Switching Regulator. Fairchild Semiconductor | |
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